Safety casing valve



April28, 1931. c. MULLER 1,802,732

SAFETY CASING VALVE Filed Jan. 19, 1929 5 Sheets-Sheet 1 Inventor W mdlhi'ezmlkf'k I A tzfomey April 28, 1931.

C. J. MULLER SAFETY CASING VALVE Filed Jan. 19, 1929 3 Sheets-Sheet 2 By Attorney April 28, 1931. c. J. MULLER SAFETY CASING VALVE Ftled Jan. 19, 1929 s sheetssneet s Inventor Patented Apr. 28, 1931 UNITED. STATES.

PATENT OFFICE J. MULLER, OF EAGLE ROCK, CALIFORNIA SAFETY GASIN G VALVE Application filed January 19, 1929. Serial No. 333,555.

The present invention relates to a safety casing valve and has for its prime object to provide a structure of this nature whereby the valve may be 'closed with the tools in or out of the well casing in case of a fire, gaser,

. pose for which it is designe With the above and numerous other objects in view as will appear as the description proceeds, the invention resides in certain novel features of construction,and in the combination and arrangement of parts as will be hereinaftermore fully described and claimed.

In the drawing: Figure l is a top plan view of the valve Q embodying the features ,of my invention,

Figure 2 is a side elevation thereof, Figure 3 is a sectional view taken substantially on the line 3-3 of Figure 2,

Referring to the drawings in detail itv will be seen that letter A denotes the upper upper casting A includes a cylindrical -porcasting and letter B the lower casting. The

tion 5 for threadedly receiving tubin 6 and rising from a plate 7 integral therewith.

The casting B comprises a cylindrical portion 8 depending from a therewith and bolted as at 10 to the plate 7. The plate'9 is provided with a pair of oppositely disposed recesses 11 for slidably receiving valve plates 12 and 14: which are of a substantially semi-circularformation and breaking the Babbitt collar and plate 9 integral about the tools or cables.

on the straight edge of the valve plate 12 there is formed'a single rib 15 while on the straight edge of the plate 14 there is formed a pair of spaced parallel coextensive ribs 16 for receiving the rib 15 therebetween as will be brought out later.

The edges of these ribs are provided with notches 17. From the same side of the valve plates there extends lug 18. A shaft 19 is journaled through a bushing 20 in the plate 9 and a cap nut '21 is threaded on the bushing to form a st g box about the I shaft to the outside of the casting 9.

This shaft has oppositely threaded portions 22 threaded in the lugs 18 so that when the shaft is turned'in one direction the plates are drawn toward each other and when the shaft is turned in the other direction the plates are moved away from each other.

A frangible Babbitt metal collar 25 has a plurality of grooves 26 cut therein and is provided with'ears 27 projecting outwardly at diametrically opposite 'points to fit into the notches 17 of the ribs 15 and 16. This collar is located between adjacent ends of the cylindrical portions 5 and 8 which are formed with seats 28 and 29 respectively for receiving the upper and lower ends respectively of the collar. The collar 25 provides a smooth, unbroken passage for the fluid through the valve and normally protects the plates 12 and 14 and the screw shaft 19 from the fluid.

A hollow branch 30 projects from the cylindrical portion 8 so that piping 31 may be connected therewith.

vThe valve is open during all drilling operations as is disclosed in Figures 4 and 5 to advantage. This valve is closed only in case of emergencies. To close the valve it is turnedto the right or clockwise by a hand Wheel 32 on the shaft 19 and causes the valve plates to move toward each other closing If no tool or cable is in the well, then the rib 15' will be received between the ribs 16 to fully close the passage between the castings. An extension 14 is provided onthe shaft19 so that the shaft 19 may be rotated at a remote.

point from the well.

A side outlet or branch is provided at the lower casting to be used as a by path 5 to which the pipe line 31 is connected and leads to any late remote from the well.

It is thoug t that the construction, operation, utility and advantages of this inven- 7 tion will now-be quite apparent to those I 10 skilled in this art without a more detailed description thereof,

The present embodiment of the invention has been disclosed in considerable detail merely for the purposes of exemplification since in actual practice it attains the features of advantage enumerated as desirable in the statement of. the invention and the above description.

It will be apparent that changes in the details of construction, and without departing from the spirit or scope of the invention as hereinafter claimed or sacrificing any of its advanta es.

Having t us described my invention, what I claim as new is:

A safety casing valve comprising asectional pipe'fitting 'composedof a pair of laterally disposed and relatively connected plates having flattened contacting faces ceni so trally apertured and respectively provided 7 with a threaded cylindrical pipe coupling extension aligned with said central apertures of the said plates, one of the said plates having its contacting face recessed on as'opposite sides of the central aperture, and

- [both of said plates having their cdntacting faces rovided with circular recesses adjacent t e edges of the central, apertures to provide annular seats, a frangible collar in- 40 terposed between the contacting faces of the plate with its opposite edges engaged in the said annular seats to provide, in conjunction with the central apertures and extensions of g the plate, a continuous bore ,:or passageway 4&5 through the said fittings, aivalve plate in each recess of the, said lower plate presentmg a straight edge at its inner or collar engaging end, and means for movinglthe plates toward each other for breaking the said collar and, meeting at their inner ends to close said passage. 0

4. In testimony whereof I a'fiix m J si ature. CHARLES J. EB. 

